Note: This page was compiled using each submarines pennant number as
known.

Since then I have found that about 1961? submarine pennant numbers were changed. With the range 1 -
99 allocated to post-WW2 diesel boats, and 101 onwards allocated to
Nuclear powered boats. For example, HMS Dreadnought originally
allocated pennant S80, became S101.

Also, from the second Trafalgar Class SSN, nuclear boats have been
allocated numbers below 100. So another
renumbering exercise has taken place. When research reveals what has been
happening the following list will be re-arranged.

So the numbers listed should be used while taking the above into
account.